Mold-core



C. F. STRAUSBAUGH.

MOLD GORE.

. APPLICATION FILED JUNE 1.1, 1920. 1,371,525. Patented Mar. 15, 1921.

c. F. STRAUSBAUGH.

MOLD CORE.

APPLICATION FILED JUNE Il, 1920. Mar. 15

3 SHEETS-SHEET 2- Q S* gN 'SMJ l 1 f d Il 3 SHEETS Patented Mar. 15, 1921.4

MOLD CORE. APPLICATION HLED JUNE l1. i920.

C. F. STRAUSBAUGH.

CHARLES FSTRAUSBAUGH, OF DETROIT, MICHIGAN.

MOLD-CORE.

Specification of Letters Patent.

Patented Mar. '15, 1921.

Appication mea June 11, 1920. serial No. 388,251.

T 0 all whom t may concern.'

Be it known that I, CHARLES F. STRAUS- BAUGH, a citizen of the United States of America, residing at Detroit, in the county of Wayne and State ofMichigan, have invented certain new and useful Improvements in Mold-Cores, of which the lfollowing is a specification, reference being had therein to the accompanying drawings.

In the construction of hollow walls', chimneys, conduits and other Vhollow structures,

Y it .is often necessary to use collapsible cores,

especially' when the' hollow structures are made of concrete or other plastic material.l and in the use of such cores it is essential that the parts of the cores be assembled so' as to provide rigid and durable forms about which the concrete or other plastic material may be ta-mped to solidify without any danger of the walls of the core collapsing. It is furthermore essential that the parts of the core be constructively arranged so as to facilitate assembling and disassembling without any undue binding action of one part of the core relative to other parts thereof. Y

My invention aims to provide a collapsible core wherein positive and reliable means are employed, in a manner as hereinafter set forth, for interlocking the parts of the core so that the same cannot become accidentally displaced due to any pressure o1' stra-ins on the parts `of the core during its use. The. manner of interlocking or articulating the core parts permits of the core parts being easily and quickly assembled and disassembled, and provision is made for placingthe cores in superposed relation for the construction of a wall or chimney of considerable height, the cores being `arranged to provide clearance for tie members that may be employed between the walls of the hollow structures.

My invention further aims to provide a collapsible mold core having parts that may be constructed of solid material provided with suitable facings to withstand wear and tear incident to the assembling and disassembling of the moldparts. vIn'lieu of the solid material entering into the corepart, each part may -be fabricated from structural metal or other .materialland suitably trussed or bra-cedthroughout to have the same firmness as though solid.

that may be of various shapes and Sizes according to the structure to be made hollow i by the use of the core, and the mechanical construction entering into the core will be hereinafter specifically described and then claimed. l

Reference will now be had to the drawings, wherein- Figure l is a. vperspective view 0f the IDOld core;

Fig. 2 is a plan of the same;

Fig. '3 is a side elevation of portions of cores placed in superposed relation;

Fig. 4 is a. horizontal' sectional view of the mold core showing solidrmo-ld parts or members provided with interlocking facing strips; Y.

Fig. 5 is a Similar view showing core members fabricated from structural s'teell or other material;

Fig. 6 is a perspective view of a foundation member of a core;

Figs. 7 and 8 are-perspective views of adjoining members for the -foundation mem-V ber; i

Fig. 9 vis a perspective view of a keyed member which interlocks all of the core members A Fig. l0 is a horizontal sectional view of the mold core taken on the line X-X of Fig. 3; x

Fig. 1l is an elevation of an adjoining member interlocked with the 'foundation member;V

Fig. l2 is a similar viewv of the other ad-v joining members interlocked with the foundation member;`

Fig. 13 isa plan of a mold core that is oblong and designed for forming a Ahollow wall, and

Fig. 14 is aside elevation of the same.

The mold core to be herein described is of the same cross sectional area throughout its lengthyand by reference to Fig. 1 it will be noted that Ythe assembled coreVV members provide 'anv oblong structure having opposed walls in parallelism and the end walls in parallel planes at a right angle to the side walls .of the core. As'the mold core has iits members .interlocked by a keyed member necessitating 'the assembling of the eore'parts ina predetermined manner,the core parts or members wlll be consldered 1n their order,

'I that is, the orderof assembling.` My invention still'further aimsto provide l et-Strong, durable -andrine-Xpensive-m'old core Considering the foundation member reference will be Vhad to Figs. f6, 1011 and 12. A

This member has walls 1, 2, 3, and 4 with the Y Walls 1 and 2 in planes at a right angle to each other and the walls 8 and 4 tapering inwardly from the lower end of the foundation member to the upper end thereof, so that the cross sectional area of said member gradually decreases from the bottom r basel of the member to the top thereof. 0n the tapered wall 3 is a dovetailed tongue 5 and on the tapered` wall 4 is a dovetailed tongue 6. lThese tongues also taper inwardly from the lower end of the foundationmember to the upper end thereof and said tongues are disposed at an angle to the longitudinal edges of the tapered walls 3 and 4. At the juncture'of lthe walls 3 and 4 there is the longitudinal slot 7 communicating with a vlongitudinal recess in the foundation member, said slotor recess being approximately throughout the lengthl of the foundation member with the slot and recess tapering inwardly from the upper end of the foundation member to the lower end thereof so that any structure which enters the slot and recess must beplaced therein at theupper end of the lfoundation member.

On the lower end of the foundation member is a base piece 9 affording lateral ledges' at the lower ends of the tapered walls 3 and 4, and adjacent an edge of the base piece 9 y and in the bottom thereof is a groove 10.

tion member are shownin Figs. 7 and 8, and

considering the member of Fig. 7, the first to'be placed in engagement withthe foundation member, said adjoining member is ralsed and lts lower end placed m engagement with theupper end of the foundation memberV so that'it may be shifted downwardly on the wall 4 of said foundation member. 'TThe adjoining. member has walls 16 and 17 with the planes thereof at a right vangle 'to each other similar to the walls 1 and 2 of the foundation member, and in addition' to thewalls 16 and 17 there are tapered walls 18 and 19. The tapered wall 418 is tapered inwardly from the upper end of the member to vthe lower end thereof and corresponds to the taper'of the wall 4 of the foundation member, so that when the walls4 and V18 Aare in abutting relation the wall 17 ofthe adjoining member will be in parallelism with the wall 2 of the foundationmember. The tapered wall 18 has a dove-tailed groove 2,0V

disposed at anangle tothe edges of the wall 18 and tapered inwardly from the lower end of the member-to the upper end thereof so that the groove will correspond to the tongue 6 on the wall 4 of the foundation member and end thereof, as clearly shown in Figs. 7 andV 11. This groove has its centerline parallel to that edge of the tapered wall 19 adjoining thetapered wall 18, `and this groove receives a portion of the key member which will be hereinafter 'referred to.

On the lower end of the adjoining member is a base piece 22 of less area than the lower end of said member and providing a ledge projecting' from the lower end of the tapered wall 19. This base piece serves as a continu-V ation `of the base vpiece 9V of the foundation member when the adjoining member is' placed in engagement therewith, and said base piece has a groove23 in itsy lower face which alines with the groove 10 in the lower face of the base piece 9.'

On the upper end of theadjoining member is an enlargement 24 having a projecting portion25 adaptedto overlap the upper end of the itoundation member and abut the flat enh gement 11 thereon. Connected to the enlargement 24 by a tonguey and'groove connect n a spacing member 26 and ono end of 'said spacing member is bereled, as at 27 so as to reeeivejthe Vsection orgateY 15 .of the spacing member 14 of the foundation member. The spacingmember 2G of the adjoining member servesoas a continuationr o the spacing'- meinberlel of the .foundation member. and these spacing members have the upper edges thereof Vproif'ided with a longitudinal tongue28 adapted to fit in grooves 10 and 23 of a core' placed'on the spacing member, as shown in Fig. thus permitting of superposed cores being interlocked against lateral displacement with a space between the confronting en lsof the superposed cores. f Y y f Considering the other adjoining member best shown in Fig. 8 there arew'alls 29 and 30 disposedin planes at a right angle to leach other andL taperedwalls 31 and 32.

llo

'lhewalll 81 iis tapered inwardly Afrom the upper end'of the member to thelower end thereof and is provided with a tapered dovetail groove 33 Vcorrespending in Vangularity to the tongue 5 of the wall 3 ofthe foundation'member so thatV the walls 3 and Sigmay beplaced in abutting interloiclied relation. The wall 32 isv tapered 4inwardly fromfthe lower end ofthe adjoining member to the iso center line parallel to that edge of the wall 32 adjoining the wall 3l.

The lower end ot' the adjoining memberV has a base plate 35 as a continuation oi' the base piece 9 and the lower face of the base piece has a groove 36 adjacent its side edge. The upper end of the adjoining member has a flat enlargement 3T provided with a projecting portion 38 adapted to overlap the upper end of the Aitounclation member and abut the enlargement 11 thereof, The enlargement 37 has a detachable spacing member, and a hinged section, generally designated 39, that are similar tothe spacing member 14 et the foundation member.v

The lastmember oi" the core to be assembled is the key member shown in Fig. 9, which has'w'alls 40 and 41 in planes at a right angle to each other and these walls cooperate with the walls 1, 2, 1G, 17, 29 ainf 39 ot the other core members in providing a core that has exterior walls in parallel planes at a right angle to each other as best brought out in Figs. 1 and 19. ln addition to the walls 49 and 41 there are tapered walls 42 and both ot which taper inwardly from the upper end of the key member to the lower end thereot1 and correspond in inclination to the walls 32 and 19 of the adjoining members. The tapered wall 42 has a longitudinalr dove-tailed `groove 44 'to receive the tongue 34 of the wall 32 and the wall 43 has a tapered dove-tailed tongue 45 to tit in the groove 21 of the wall 19. At the juncture of the tapered walls 42 and 43 there is a longitudinal tapered key 46 adjoining the key member by a neck portion 47 and the key 46 tapers inwardly from the upper end of the key member to the lower end thereof so that said key and its neck portion may be placed in the recess 8 and the slot 7 of the foundation member and thus :interlock the tour members ofthe core through the medium ot' the tongue and groove connections between the confronting faces or walls of the assembled core members.

On the lower end of the key member is a base piece 48 having a groove 49 and this base piece serves as a continuation ott the base piece 35 with the groove 49 alining with the groove 36 of said base piece. It is new apparent that the base pieces 22, and 48 cooperate with the base piece 9 of the toundation member in providing a sectional base or Jrooting for the core and the grooves 3G and serve the same purnose as the grooves 10 and 23 heretofore described in connection with Fig. 3 of the drawing.

On the upper end of the key member is a comparatively large flat enlargement 50 having projecting portions that overlap the upper ends ot the adjoining members and cooperate with the enlargements 11, 24, and

3S in forming somewhat of a cap on the top ot' the core. The enlargement 5() ot the key member has its edge thereof provided with a spacing member 51 which cooperates with the spacing member 39 in providing a spacing;` member in opposed relation to the spacing members 14 and 2G, and as heretofore mentioned the spaong men'ibers cooperate in supporting another core in spaced rela' tion to the supporting core.

'In the construct-ion ot a hollow wall or any large structure necessitating outer mold walls 52, as indicated by dot and dash lines in Fig. 13, it is oiften necessary to use transverse braces, tie rods or similar members and the spacing members 14, 26, 39 and 51 on the upper end of each core provide clearance for the braces 53, which may be laterally withdrawn trom a iinished wall or structure. To insure proper spacing oi the braces the spacing members may have the ends thereof cut away or recessed, as at 54 (see Figs. 1 and 14) to receive the braces 53, and the holes lett in a wall by the withdrawal of the braces may be closed as the construction or the wall progresses. Fig. 13 also brings out the tact that the core members may be oblong in planor horizontal section, in contradistinction to the shape shown in Fig. 19, sot-hat the members may be used to form a trough or hollow wall.

The spring members and the hinged sez'- tions or gates thereof cooperate in providing releasing means trom adjoining members and also retaining means by extending over portions ot the key member. f

As brought out in Figs. 4 and 10 the core members are made oi solid material and when such material as wood is employed the confronting interlocking faces or walls of the core members may be provided with facing strips 55, made of metal, to aiord tongues, grooves, a recess and a key tor interlocking the core members. lVith the facing strips made of metal the body of each core member is net .subjected to wear and tear during the assembling or disassembling of the mold core members.

Instead ot making the core members of solid material it is possible to construct the same ot structur l steel, as shown in Fig. 5, so that each core member will be hollow and may be trussed or braced, as generally indicated at 56. lith these core members made of pressed steel or similar metal it is possible to shape the walls thereof so as to afford the necessary interlocking tongue and groove connections between the core members.

It is thought that the utility of my collapsible core will be apparent without further description, and while in the drawings there are illustrated the preferred embodiments of my invention, it is to be understood that the structural elements are susllfi ceptible to such changes in size, shape and manner of assemblage as fall within the scope of the appended claims.

l. A mold core composed of members having interlocked confronting faces, and spacing members on thel upper ends of said interlocked members.

2. A mold core as characterized in claim l wherein one of said members serves as a key for interlocking all of the other mem bers. Y

3. Superposed mold cores, each composed of interlocked members, spacing members on the upperV ends of said interlocked members, and base pieces on the lower ends of said interlocked members adapted to receive the spacing members of an adjacent core.

4. A mold core composed of a foundation member, adjoining members, and a key member', said key member engaging in said foundation member, and said adjoiningmembers having tongue and groove connections with said foundation member.

5. A mold core as characterized in claim 4, wherein said key member has a key and neck portion fitting in a recess and slot of said foundation member. Y

6. A mold core composed of a foundation .member, adjoining members, and a key member, tongue and grooveconnections be- -tween said foundation and adjoining members, tongue and groove connections between said keyand adjoining members, and a key connection between said key and foundation members. r f A 7. A mold core as characterized in claim 6.' wherein'the tongue and groove connections of said foundation and' adjoining members are tapered inwardly from the lower end of the corel to the upper end thereof and disposed'at an angle to the onte'r walls of the foundation member.

8. A mold core as characterized in claim 6, wherein the tongue and` groove connections of said key and adjoining members are tapered inwardly from the upper end of said core to the lower end thereof and disposed parallel to inner walls of said key member. Y Y

9. A mold core as characterized in claim 9, wherein spacing members are detachably mounted on the upper end of said core to engage Vin the. lower end of a superposed core to maintain the adjacentcores in spaced relation. Y

l0. A mold core comprising a foundation member having tapered walls with a recess at the juncture of said walls, adjoining mem bers having tapered walls with some of said walls engaging the tapered walls of said foundation member, a key member having tapered wallsrto engage the other tapered walls of said adjoining members, and a key carried by said key member to engage in the recess of said foundation member. Y

il. A mold core as characterized in claim ll, wherein tongues and grooves connect the tapering walls of all offsaid members.

l2. A mold coreVV comprising separable members, spacing members carried by said separable members, and hinged gates carried by said spacing members, and extending on certain of said separable members to pre-` clude removalV of said members until said gates are'removed. y

13. A mold core comprising a foundation member, Vadjoining members, a key member having an upperend overlappingV said foundation and adjoining members, and retaining meansin an adjoining member extending on to said key member to lock-said key member in engagement with said foundation and adjoining members.

f ln testimony whereof I afiX my signature in the presence of two witnesses. Y

CHARLES F. VSTRAUSBAUGH. f Vitnesses: Y

KARL H. BUTLER, V G. E. MCGRANN.. 

